Coffee grinder



Jan-,21, 1941- G. P. ANDERSON Erm. 2,229,031

' CFFEE GRINDER Filed Dec. 28, 1937 2 sheets-sheet 1 INVENTORS GEORGE P. ANDERSON By lDOUGLAS GAN son JL... yf

ATTORNE S Jan. 2l, 1941. G. P. ANDERSON aux.

COFFEE GRINDER Filed Dec. 28, 1937 2 Sheets-Sheet 2 FIGB.

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Patented Jan. 2l,

UNITED sTrlTl-:s PATENT oFFlcr-:q

COFFEE GBINDER George P. Anderson and Douglas G. Anderson,

Detroit, Mich., assigner to The Standard Computing Scale Company, Detroit, Mich., a cor--` poration of Michigan Application December 28, 1937, Serial No. 182,107

` 4 Claims. (Cl. 83-18) The present invention relates to grinders for codec and similar materials `and specifically to grinders of the klndcommonly used by grocers to grind codec to the requirements of individual sageway 36 leads as indicatedvfrom the cup of l member to a point near the line of housing 29 and is continued into a vertical moulding and spout member 31 which extends from the base 5 customers. Y. l0 to ring member 21 and is held thereby in the 5 Among the objects oi the invention is a grinder same fashion as housing 2! being valso xed to exvvhich will be more compact and thereby require tension 35 as by screws 3B. The moulding also` less counter space than those in common use. serves to span the space between the vertical Another object is to improve the appearance edges of Ahousing 2S. l@ oi such devices by repositioning the elements into Mounted upon the portion of shaft 22 which 10 a vertically aligned concentric arrangement. projects above partition 2| in the cupped member Another object is to decrease 'the cost of con- 20 is a rotatable plate 40 provided with a hub porj struction, `while at the same time increase the tion 4I keyed to the shaft 22 by a comparatively case oi assembly, the eiiiclency and reliability soit metal key 42, showniin Figure 3 as a disc, l5 ci operation. and above the plate and secured thereto is an 15 -Other objects and advantages will be apparent upwardly extending attened agitator member to those skilled in the art upon reference to the 43, serving, when the grinder is in use, to prevent following description and the accompanying bridging of the incoming material. drawings, in which Fixed to the plate 40 as by screws 44 is a burr 2U Figure i isa view inelevation of the grinder. plate 45 constituting the lower burr of the pair, 20

Figure 2 is a vertical section on line 2--2 of and around the periphery of this burr 45 upon the Y Figure d. extending edge of plate 4D may be mounted A Figure 3 is a vertical part section on line 3--3 radially arranged vanos 46. The upper and sta.- Ui? F1o 4- tionary burr 50 ls iixed to the bottom of a cup 5i 25 Figure tis a horizontal section on line 4--4 of slidable in the cupped member 20 and prevented 25 :Figure Si. from rotation by means of a key 52 fixed to the Figure 5 is a sectional view on line v5ii of inner wali of the latter. This cup 5i has a cenn Flame i: and trai opening in its bottom surrounded by a hopper lrigure is a sectional view showing a portion portion t3 and the burr 5U is provided with a 3o oi' the top construction. v similar central opening registering therewith.V 30

as indicated in the drawings,` the grinder com- Ncar the upper edge of cup 5l and in the outer prises a circular base member lo adapted to rest surface thereof are provided a plurality of reupon a resilient ring Il of preferably rubber, and cesses 5 having openings into the interior of the which may be supplied with a sheet metal closure cup and seated in said recesses are short plugs 56 35 piste i2. Mounted upon the base I0 and ilxed whose stems extend through the openings into the 35 thereto is a spider I5 serving to support a vertlcalcup and are xed to spring members 51 conven ly arranged electric, motor 18, the latter being iently secured to the inside bottom of the cup and hired to the spider. extending suiciently above the upper edge of 'The upper end of the motor housing is provided the latter to provide handle portions 58. 4.o with a suitable seat upon which is fixed a casting The head portions en of plugs 56 are of such 4o 2o. This casting is generally cylindrical and prosize as to extend beyond the periphery oi the cup vided with a horizontal partition 2| near its il when thrust outwardly by the springs 51 and iower end. which partition is, however. apertured on their outer faces are provided with substancentrally to allow the motor shaft 22 to project tially parallel ridges formed and arranged to con- 4.54 up into the cup so formed. The member2l exstitute portions of screw threads adapted to coact 45 tends well up above the motor I8 and is provided with corresponding 'screw threads formed upon as at 24 with a thick ange and at a somewhat the inner periphery o! a rotatable ring 6I. This lower level with a plurality of outwardly extendring is seated upon a suitable shoulder formed ing lugs 25 (these being shown best'in Figs. lland in the thick flanged upper edge 24 of member 20 5). Fixed, by means oi suitable feet 2.6, upon and is maintained in place upon the shoulder by 50 lilas 251s a rios member 2l and this is preferably tongues 82 extending 'thereover from foot por-4 grooved around its lower edge portion as at 2l to tions l! oi a sheet metal cup 04 forming part of receive and holdin place the upper edge of a the superstructure suporting the-feed hopper.` cylindrical housing Il, the lower edge-being re- 'I'his superstructure comprises the cup 64 which ceived in a similar groove 2l in basemember il, is largely cut away at diametrlcally opposite por- 55 a suitable gasket lla being providediy v tions oi.' its bottom except for the foot portions y As indicated in Figures 2 and 4, the member 2l Il, but leaving a. ring portion il at its upper end, is also provided with a lateral extension Il pro w which is secured as. by spot-welding or in any vided with a passageway '2t opening tangentially other suitable fashion, a sheet metal outer cover to the inside of the cupped member 2l., Ihispas- It, the upper end o! whichcurves inwardly to 00 

